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As for shadow codes - I am lucky enough to have as my racing buddy the lead mechanic at a bmw dealer - All I can say is there is no trace at all with stage one - not sure about the others.
As for wastegate - I do have the electronic one and it works fine with stage one.
As stated before the real performance test wil come in a couple of weeks at the track 1/4 mile. Since it is all wheel drive hence no traction problems - and the air will be cool - we will be in the 12 sec somewhere based on what I have seen so far.
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